Dent remover



Dec. 22, 1.931.

B. W. SUNDE DENT REMOVER Filed Feb. 17, 1950 2 sheets-snaai 1 h5 #ma @yv Dec. 22, 1931. B, w; SUDE 1,837,690

DENT 'REMOVER Filed Feb. 17, 1930 2 Sheetheet Patented Dec. 22, 1931 FORNIA f BENJAMIN vv; SUNDE, or none BEACH, oanironnranssieivon -To inraexvrnnnfaf Sunnis, mconroaa'rnn or Lone naaien. cerimoniale,

f resaca-s DENT REMOVER This invention relates to a i device for straightening pipe or other tubular parts and relates more particularly to a device for re` moving indentations and irregularities from pipe, casing, etc. Y y A Various types'of devices are employed 1n removing indentatioiis and, irregularities from pipe. One formgofdevic used for .straigtening pipe includes" shoes to be inin a pipe and-adapted to be operatedV and con? trolled from the end or exterior of thefpipe sary to providea conduit, forfde serted in a pipe, Vand cylinder and'piston means .for spreading or Yforcing the 'shoes apart to force them Ainto endagementiwith the interior of the pi e. In Jghe forrnof` del viee referred to, the uid pressure operating the means for forcing the shoes apart is def must necessarily be Vplacedfor arranged the pipe to bein operating position, and the fluid pressure means or' cylinder and piston means for operating the shoes is betvve'en the shoes or in close proximity to theshoes verng the fluid under pressure to the fluid pressure means, that is suiiiciently long to extend from the pump for developing fluid pressure at the end of the pipe, to the fluid pressure means adjacent the shoes. W hen al device of thetype mentioned is to be used in long lengths of pipe, the fluid conduit must be very long and the device is more or. less inconvenient and difhcult to handle and control.

It is a general object of the inventionto provide a simple and compact device for removing irregularities and indentations from pipe, and the like, that is ,inthe form' of a complete unit adapted to be `bodily inserted Another object of the invention is to provide a dent removing device of the character mentioned that is in the form of a compact unit adapted to be inserted in a pipe that includes a jacl'orcylinder and piston mecha# nism for forcing ashoe against the interior of the pipe and embodying a pump for supplying fluid under pressure to the cylinder and piston mechanismf p f Another object of the invention is to proit is neces-`l vide a Y device. of thelcharacter mentioned which the pump `is arranged adjacent the..

cylinderfand piston" mechanism and is adapt-f' edtobe manually orymechanic'ally operated through an operating memberadapted to be connected With the pump and adapted to pro? ject zfrom an end of thefpipe.

Another `objectnoi the invention to'pro' A CORPORATION IQFCAIJIT:

videja device of thefchara'cter mentionedin;vv

which pressure 'in thecylinder of the j'ackfor.

cylinder and piston mechanism, may lloe-re-r vide a device of the character mentioned in Another object `ot theinvention to "proal which the` member for'operating` the pump? and the control rodffor'th valve are" detach? ablefrom the device'and may beprovidedin various lengthsyS'Q` that the device maybe. conveniently operated and controlled in VarigA ous positionsin pipes'of various lengths. Another objectofthe invention is to provide a dent removing device lof'thefcharacter mentioned that isconstructed' so that) itis adaptable to be used in pipes :of various diameters. ""1 Y Other objects and features of the invention4 will be best and more fully understoodfrom the follovvingdetailed description of atypi-A cal form and l application of the invention', throughout which description reference `is had tothe accompanying dravvingawhich zj Fig. l is'an end view of the deviceprovi'ded `bythisinventionV showing' it 'arranged -in a tubingor pipe. Fig 2 is a side 'elevation/of the device in 'a pipe. Fig. 3' is an"e`nl`arged vertical detailed sectional .View of the device, and Fig. 4' is yan enlarged vertical sectional` vievv of the `valvemechanism ofthe' pump embodied in the present invention:

The 'device provided bythis invention includes, generally, a body or base l0 adapted to be arranged against the interiorjof a pipe,v

or the like, a jack or cylinder and piston mech-` 95 anism 1l on thebase forV operating a sho-e 12 intoengagement With the interior of afpipe, a fluid reservoir 13 on the `baseV 10, a pump "l forsupplying fluid under pressureto operatel the cylinder and 'piston mechanism '11,V and means for releasing the pressure in the means 11.

VThe body or base 10 is provided to carry the other parts of thedevice and is adapted to be arranged or seated against the inner lwall of-a' tubular part such asa pipe P. VThe base 10 is'preferably elongated soiV that it is adapted to be arranged longitudinally or Y axially in Ythepipe P and is shaped to eied tivelyy seatv againstthe curved interior of the pipe. The base 10 is provided with a curved outer side-16 and a flat inner or upper side 17.

In accordance with the invention the base'is proportioned sothat it` has a large outer side 17 which is adapted to seat on a substantial portion-'ofthe interior of= the pipe sothat the base does not distortthe pipe when the shoe 12fis'iorced against the interior ofthe pipe.

Thebse 10E isshaped and proportioned' so .that there ils/considerable space-betweenits inner side 17 and thewall ofthe pipe. above or opposite the side 17 ItL is preferredrth-at thebase 10 occupy onlya small portion of the 'cross sectional dimensionof the pipe. I Inaccordance with' thel invention, means..-

isuprovided for adapting the Vbase to be eifec tively seated: OntheinnerWaI-Is of pipeeff various diameters. Thefcurvedjor outer side 16 is shaped to effectively seat on the interior-4 Vof-a pipe of'agiven diameterand fille-in shoes 18 having curved vouter sides toconform-to.I thefinteriorofa pipe P ofV larger diameter.y may be removably 'mounted on the curved outer 'side 16. VTlaes'hoes 18 are provided .at y longitudinallyspaced points on. the side 16.

and extend circmnferentially of theA side. The shoes v18y may beV detachably secured to thebase 10 by any suitable means. Spacer rods 19 may be arrangedvbetween the shoesY 18. It :will be obvious thatshoes 18 of vari,-V

ous-sizesmay be providedV to .adapt the device to be'used in pipes of various diameters.

Thejackor'cylinder and piston meansl 11 is provided to operate .the -shoel 12 outward l relative to thebaselO to engage ai dented or irregularfwall Vof the'pipe. The, means 11 includes acylinder- 21 carriedfby the ybase yl0- andf a plunger `or piston 22 slidably. carried' in:the-cylinder'21jand carrying the shoe-12.

kThe-cylinder 21 may bea plain tubular partj having one end 'screw threaded into an open-V ing: vor socket 23 in the Vflat` side' 17 .015'k the; base. The central longitudinal axis r'off the cylinder 21 is. preferably diametric relative tothe curvature ofA the curved outerside 16' the cup leatherbyabolt 26 screw threaded into an opening in the inner end of the plunger.

The shoe 12 is removably mounted on the outer end of the plunger 22 outwardly of the end of the cylinder. In the particular case illustrated, the. shoe 12l has an outer'V face curved to conform to the normal configuration of the interior of the pipe P. Thev shoe '.12 maybe detachably connected with the plunger by means of a stud'27 carried bythe shoe and screw threaded into an opening ,in the outer end ofthe plunger 22. VThe inner side of the shoe l2 may be flat to effectively seat on the end of the'plunger 22. Shoes 12l of various sizes having outer faces of various configurations may be mounted onV the plunger 2.2to adapt the vdevice for use in various types and sizes of pipe. 'Inthe particular case illustrated in the drawings the outer lside of the shoe12 is curved con, cent-rically with the outer sides of' the shoes 18 andhas the same diameter of curvature as the curvedvouter sides of the shoes r18.

A central longitudinal passage 28 is .pro-V videdthrdugh the plunger 22. The passage 28 communicates with the opening'oarrying the bolt 26 and a longitudinal opening v29 is provided'in the bolt. 26 yto register with ythe passage 28. The upper end of the passage 28 communicates with lthe opening carrying thestud27. A socketor enlargement 30k is provided at theupper or out-er end of the passage.. 28,Y below "the studw27. Ay lateral opening 31 is formedin the head of the bolt 26to-communicate with the passage 28.. The opening'Y 31 extends to the exterior. of the head ofthe'bolt atapoint adjacent the disc 25. f a

The passages 28 and 29 are provided to bleed or remove air or gas from the cylinder 21 when the device is initially operated orwhen air or gas accommulates in the cylinder. A ball valve 32 is arrangedin the enlargement 30 of thepassage 28 to normally close the passage. A lock orvclamp screw.V 33 may be threaded'into theenlargement 30 to-normally clampy thev valve 32 into sealing engagement, with ajseat `formed inthe passageto close the passage; Y Y

The reservoir 13 is mounted" on the base 10 and is provided'to contain fluid, for instance oil,` for operating the plunger 22. The reservoir 13 may include a cylindrical body 34. The body 34 of the reservoir may have its upper end closed by a head or cover plate 35and its lower end mayseat or extend into an annular recess 36 in the outer side 17 of the base. Inl accordance with the invention the body 34 of the reservoir is arranged on the base 10 adjacent the cylinder 21. Clamping bolts 37' may extend throughthe cover plate 35 and longitudinally through thereservoir to retainl the body 34 in position. The lower ends of the bolts 37 may berscrew threadedv into openings in the Outer sidev 17 of the base and heads may be provided on the outer ends of the bolts to clamp the cover plate 35 against the upper end of the body 34. Diametrically opposite bearing lugs'38 are provided on the interior of the body 34 adjacent its outer end. Y Y

The pump 14 is provided toy supply fluid under pressure to the cylinder 21 to operate the piston or plunger 22. In accordance with the invention the pump 14 is adapted to be manually operated; it being obvious that the pump may be mechanically operated vwithout departing from the spirit of the invention. AThe pump 14 may be an accepted type of pump suited for use in connection with the cylinder and piston mechanism 11. In the particular caseillustrated the pump 14 includes a cylinder 40 mounted on the base 1() and arranged within the reservoir 13, a plunger or piston 41 slidable in the cylinder 40, intake and outlet valves 42 and 43, respectively, for the cylinder 40, and a crank shaft 44 projecting from the reservoiiI 13 and adapted to receive an operating member 45. The cylinder 40 of the pump may be axially and concentrically arranged within the body 34 of the reservoir 13 and may have its inner end screw threaded into an opening 46 in the inner side 17 of the base 10. The piston 41 extends through the outer y end of the cylinder 40 to project into the' interior of the body 34 of the reservoir. The outer or projecting end of the piston 41 may be enlarged and may have spaced yoke parts 48. A suitable packing or cup leather 49 may be provided on the inner end of the piston 41. A packing gland or stufing box 50 may be provided at the upper end of the cylinder 40 to pack around the piston 41.

The valves 42 and 43 are shown arranged in a valve block 51 carried in the inner end of the opening 46. The valves 42 and 43 may be in the nature of spring pressed ball valves. The valve 42 is provided to control the passage of fluid through an opening 52 communicating with the interior of the reservoir 34 and the lower portion of the opening 46. The valve 42 may be arranged in a passage in the block 51 communicating with the cylinder 40 and the opening 46. The valve block 51 closes the lower end of the cylinder 40 so that iuid is prevented from entering the end of the cylinder from the lower portion of the opening 46. The outlet valve 43 controls the passage of fluid through a passage 53 communicating with the cylinder 21 and the cylinder 40.

The crank shaft 44 has axially aligned portions 54 rotatably carried in openings 55 in the bearing lugs 38. Spaced eccentric arms or crank arms are provided on the shaft 44 within the reservoir body 34 and carry an eccentric 56. A connecting rod 57 operatively connects the eccentric 56 and the piston 41. The rod 57 may be connected with the yoked parts48 bya suitable pin. One of the portions 54 of the crank shaft 44 has a polygonal part 58 projecting outwardly from the body of the reservoir 13 through an opening 55. The projecting part 58 of the crank shaft is adapted to be engaged by the operating member 45. The member 45. is provided at its end with a polygonal socket 59 to receive the polygonal part 58. The member 45 is detachY able from the part 58. The member 45 is pref-- erably made sufficiently long to extend from an end of the pipe P to the part 58.

The means 15 for releasing the pressure in the cylinder 21 includes a Valve 60 operable to control the passage of fluid through a passage 61 in the base 10. The passage 61 extends between or communicates with the cylinder 21 and the reservoir 13. The valve 60 may be in the nature of a needle valve having a pointed inner end adapted to cooperate with a suitable seat formed in the passage 61. The body or stem of the valve is screw threaded into an opening 67 in an end of the base 10 and projects outwardly from the base'. Y The stem of the valve 60preferably projects from the same end of the base 10 as the part 58 of crank shaft. The projecting portion ofthe valve 60 has a transverse pin 62 extending through it and projecting from its opposite sides. 'Ihe pin 62 is adapted to be engaged by a control rod 63 for operating the valve. The rod 63 is forked at its end to cooperate with the pin 62 to rotate the valve 60. The

control rod 63 is made sufciently long to ber 45 may be rotated to operate the pump 40. The pump 40 supplys fluid under pressure to the cylinder 21, to operate the plunger 22 outwardly. .It will be seen that the shoe 12 may be forced into pressure engagement with the. interior of the pipe to restore the pipe to its normal configuration. Vhen it is desired to release the pressure from the cylinder 21, the control rod 63 may be rotated to unseat the valve 60 to allow Huid toflow through the passage 61 from the cylinder 21 The screw and valve may be replaced when i lowing claims.

.unitary construction thatamay be conveniently and easily operated in pipesof various diameters and lengths.

Having described only a typical preferred form of my invention, I do not Wish to limit myself to the specific details set forth, but wish to reserve to myself any changes or variations that may appearto those. skilled in the art or fall Within the scope of the fol- Having describedmy invention, I claim: l. A device of the'character described including, a base adapted to be arranged Within a pipe, a cylinder on the base, a piston slidable in the cylinder, a shoe operable into engagement With the interior of the pipe by the piston, a reservoir on the base adjacent the cylinder, a pump adjacent the cylinder for supplying iiuid pressure to operate the piston, an operating member for the ,pump adapted to e-Xtend to an end of thel pipe, and means for releasing pressure from the cylinder.

2. A device of the 'character described including, a base adapted to be arranged Within a pipe, a cylinder on the base, a piston slidable inthe cylinder, a shoe'operable into engagement With the interior of the pipe by the piston, a reservoir on thebase adjacent the cylinder, a pump adjacent the cylinder for supplying fluid pressure to operate the piston, an operating r memberl for the pump adapted to extend to an end of the pipe, and means for releasing `pressure from the cylinder, including a valve to control the passage of fluid from thecylinder to the reservoir, and a control stem for the valve.

3. `A device of the character described including, a baseadapted to be arranged Within apipe, a cylinder on the base, a piston slidablein the cylinder, a shoe operable into engagement With the interior of the pipe by the piston, a reservoir on the base adjacent the cylinder, a pump adjacent theV cylinder for supplying fluid pressure to operate the piston, an operating member for the pump adapted to extend to an end of the pipe, and means for releasing pressure from the cylinder, including a valve, and a control stem detachably connected With the valve and adapted to extend to an end of the pipe.

4.. A device of the character described including, a base adapted to be arranged Within a pipe, a cylinder on the base, a piston slidable in the cylinder, a shoe operable into engagement with the interior of the pipe yby the piston, a reservoir on the base adjacent the cylinder, a pump adjacent the cylinder, and means for removing gas from the cylinder including a valve arranged in'a passage in the piston.

5. In a pipe straightening device adapted to be arranged completely Within a pipe,'a base to seat onthe interior of thevpipe, La cylinder on the base, a piston slidable in the cylinder, a shoe onk the pistony adapted to be operated into engagement-With theinterior of the pipe, a fluid-reservoir on the base adjacent the cylinder, a pump on the base in the reservoir for developing pressure to operate the piston, an actuating member'detachably connected with the pump and adaptedtoeX- c tend to an end of the pipe, a valve operable by rotation for releasing pressure from the cylinder, and a detachable stem for the valveY adapted to eXtend'toanl end ofthe pipe.

Inwitness that I claim the foregoing I have hereunto subscribed'my name this 27th day of December,"l929.

VBENJAMIN W. SUNDE. 

